Coaster and brake.



y No. 620,575. f Patented nanas, |901.l J. G'. zlEGLEn. I

coAsTen Ann BRAKE. (Application mea n. 11, 1900.) (No Model.)

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UNTTED STATES PATENT @Fries JOHN GEO. ZIEGLER, OF READING, PENNSYLVANIA.

COASTER AND BRAKE.

SPECIFICATION forming part of Letters Patent No. 670,575, dated March 26, 1901.

Application filed January l1, 1900. Serial No. 1,063. (No moelr 4 T0 a/ZZ whom it muy concern:

Be it known that I, JOHN GEO. ZIEGLER, a citizen of the United States of America, and a resident of Reading, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Coasters and Brakes, of which the following is a specification.

My invention relates to back pedaling coaster-brakes for bicycles or similar vehicles; and it consists in certain improvements in construction, which are fully described in connection with the accompanying drawings and are particularly pointed out in the claims.

Figure lis a longitudinal View of a bicyclehub having my complete mechanism applied thereto, the several parts of the latter being shown in cross-section, those shown separately in Figs. 2, 3, and 5 being cut, respectively, on the lines a: fr, y y, and z z. Fig. 2 is an inner face view of the sprocket-wheel with the separately-formed hub clutch-ring in position therein, a portion of each being broken away and one clutch roller being shown in position with a follower-lug indicated in dotted lines. Fig. 3 is a face view of the sprocket follower-ring. Fig. 4 is an outer face view of the sprocket. Fig. 5 is an inner face View of the fixed brake-ring with the rider-ring in position therein, a portion of the latter being broken away. Fig. 6 isV an edge view of the brake rider-ring.

A represents the hub of an ordinary cycle- Wheel, and B the fixed axle on which it turns.

The sprocket-wheel D, by means of which rotary motion is transmitted to the hub A, is mounted upon a clutch hub-ring C, which is rigidly fixed to the hub, as shown, by screwing it upon the threaded portion a. of the latter against a shoulder a3, a clutch mechanism being interposed between said ring and the sprocket-Wheel, as usual in coaster constructions. This mechanism, as shown, comprises a series of rollers E, each of which rides in a pocket e, formed by a peripheral recess in the hub-ring C upon an inclined or eccentric surface c, and a follower-ring C', loosely mounted upon the hub A against a retaining flange or shoulder d and provided with a corresponding series of lugs c2, adapted to project from the outer face of the follower-ring into each roller-pocket e and to form a yielding backing for said rollers, a spring c3 being provided to lightly press the follower-ring and rollers forward, as indicated by the arrow in Fig. 2, so that a forward moving pressure on the sprocket-wheel will lock the latter-to the hubrin'g C, while a slight reverse pressure will release the latter to allow the hub to rotate independently of the sprocket-Wheel, as is required for coasting. The followerv C', it will beunderstood, always rotates with the hub A and hub-ring C and has a relative movement of its own merely to control the locking and unlocking movement of the rollers E, which is practically very slight. The hub-ring surface c', over which the follower-lugs c2 loosely project, may be concentric, as shown, instead of being eccentric, like the inclined surfaces c on which the rollers bear.

The sprocket-wheel D is provided with a circular flange d, which overlaps the outer face of the hub-ring C. To provide for braking by a reverse movement of the sprocketwheel, I form on its outer face d' a circular series of wedge-shaped projections d2, ar-

ranged to give axial movement to a looselymounted friction-ring H, adapted to be held against rotation with the hub, as shown, by means of an arm h, the outer end of which is secured in any suitable manner to the frame of the machine. The rotating brake-diskG is fixed to the wheel-hub A by screwing it.

upon the reversely-threaded portion a2 of the latter against a shoulder a4. Upon the inwardly-projecting hub g of this disk the nonrotating friction hub ring H is movably mounted, as is also the rider-ring K, which fits in the circularly dished or recessed inner face of the friction-ring H. This rider-ring serves as a carrier for a series of lantifrictionrollers J, which are loosely held in properlyspaced pockets or recesses 7c, formed in the periphery thereof, and which are of some- What greater diameter than the thickness of the ring, so as to bear directly against the friction-ring H on one side and against the Wedge-shaped projections d2 of theV sprocketwheel on the other side when the latter is turned in reverse direction. This reverse movement of the sprocket-Wheel thus causes the rollers J to ride up on its wedge-shaped projections d2 Without the objectionable friction that would result from direct contact IOO with the friction-ring H and pushes the latter outward until its conical friction-surface g is brought into contact with the rotating disk G to brake the machine as desired.

Myimproved coaster and brake mechanism is readily applied to ordinary hubs Without spreading the tread. The parts overlap, as shown, so as to make it practically dust-proof, and it is simple and positive in operation. The novel features are specifically pointed out in the claims.

What I claim isl. In a coaster brake mechanism the combination with a rotary hub, of a clutch-ring fixed thereto and provided with Wedge-shaped peripheral recesses,an operating-Wheelinclosing said clutch-ring, a follower-ring loosely mounted on said hub between a collar thereon and said clutch-ring and having followerlugs extending therefrom into said roller-re cesses, clutch-rollers in front of said lugs and a spring to the rear of the same substantially as set forth.

2. In a coaster-brake the combination with a rotary hub havin ga clutch-ring and a brakedisk fixed thereto, of an operating-Wheel reversely rotatable on said clutch -ring and having a circular ange abutting against the outer face of said clutch-ring and provided with Wedge-shaped projections on its outer face, a non rotatable slidable brakerin g mounted between said Wedge-faced iange of the operating-Wheel and said brake-disk, and the roller-carrier ring K loosely mounted between said Wedge-faced flange and said slidable brake-ring, substantially as set forth.

Signed by me at Reading, Pennsylvania, this 4th day of January, 1900.

JOHN GEO. ZIEGLER. Witnesses:

HENRY B. HINTZ, W. G. STEWART. 

